Your riffs are pretty energetic-sounding, and I like how you're experimenting with more complex harmonies. That being said, I think the song gets a little too repetitive, since you mostly repeat the same beats over and over again. Try varying things up; even just changing the volume or voice of a riff can really add extra depth to a song! Since you're using 5 N163 channels, you should also try to add more effects like echo and chorusing. When a channel isn't doing anything, consider applying an effect to another channel with it. This will make your song sound "fuller" when there are less parts playing. My final problem is with the opening beep, which is a little loud and piercing. Try lowering its volume down to a B or 9. All in all, I like the improvements you;re making.